Tim Cook, Apple's chief executive, declined to join President Trump on his recent trip to the Middle East, causing irritation to Trump.
During a speech in Riyadh, Trump praised the CEO of Nvidia for attending the trip but took a jab at Tim Cook for not being present.
In Qatar, Trump mentioned having a 'little problem' with Tim Cook and expressed displeasure over Apple's operations in India.
Trump created uncertainty by threatening tariffs on iPhones made outside the U.S., putting Apple back in the administration's focus after a previous tariff exemption secured by Cook.